The millionaire entrepreneur boyfriend of Aussie fitness guru Kayla Itsines has been fined for driving offences and possession of prescription pills which he claims were left in his car by an associate.

The Adelaide Magistrates Court heard that the 25-year-old was caught speeding in his Lamborghini at twice the legal limit last year. Tobias Pearce was convicted and fined $1500 after he admitted to driving in a dangerous manner. The CEO has been banned from driving for 12 months.

Add to this a $150 fine for possessing a prescription drug, $1000 impound fee and court costs, a few thousand dollars is an insignificant sum for the businessman who sits at number 51 of BRW’s Young Rich List. Pearce shares the spot with partner Itsines. Their self-made fortune is estimated at $46 million.

The drug cabergoline or ‘Cabolin’ is said to be prescribed “off-label” to bodybuilders who use steroids to increase their sex drive. It is alleged four pills fell from Pearce’s pocket after he gave his keys to police for impounding his car.

The Adelaide Advertiser reported that case concluded in secret in April but the court has recently released details. Magistrate Brett Dixon said the crime was not “trifling” but he declined to convict Pearce over the possession due to the “serious implications” to the health and fitness business he shares with Itsines. Magistrate Dixon accepted that Pearce put the tablets in his pocket but said that a jail term was “disproportionate” to the crime. Prosecution asked for a jail term, even if suspended.

Prosecutor Darly Pope told the court that Police estimated Pearce was speeding over the Cross Road / South Road overpass at up to 120 km/hr at 7.36am on 26 February 2016. South Road is a main arterial Road in Adelaide.

Lawyer Stephen Ey said his client “regrets the offending and he’s highly embarrassed”.